How to remove the headers from the previous API GET request and hit the new GET method with the same RequestSpecification

Question

When I'm passing the headers in the first API call, the same header is getting passed again in the second API call. I want to remove all the headers which I passed in the first API call because I don't need those headers in the second API call.

package org.Selenium.testing;

import static io.restassured.RestAssured.given;

import org.testng.Assert;
import org.testng.annotations.Test;

import io.restassured.RestAssured;
import io.restassured.response.Response;
import io.restassured.specification.RequestSpecification;

public class REst {

RequestSpecification requestSpec = RestAssured.given(); 
    private String client_id = "id";
    private String client_secret = "secret";
    private String grant_type = "password";
    private String Username = "a.com";
    private String password = "b";
    private String scope = "x";
    
    @Test
    public void token()
    {
    requestSpec.baseUri("URL1");

    requestSpec.contentType("multipart/form-data")
    .multiPart("client_id", client_id)
    .multiPart("client_secret", client_secret)
    .multiPart("grant_type", grant_type)
    .multiPart("Username", Username)
    .multiPart("password", password)
    .multiPart("scope", scope);
    
    Response response = requestSpec.get();
        
    Assert.assertTrue(response.statusCode()==200);
    response.prettyPrint();
    String token = "Bearer "+response.path("access_token");
    
    System.out.println("------------------- 1st  TC is working---------------------");
    
    requestSpec.baseUri("URL2");
    requestSpec.headers("Authorization",token);
    Response res = requestSpec.get();
    
    Assert.assertTrue(res.statusCode()==200);
    res.prettyPrint();
    
    System.out.println("------------------- 2nd  TC is working---------------------");
    
    }

When I'm passing the headers in the first API call, the same header is getting passed again in the second API call. I want to remove all the headers which I passed in the first API call because I don't need those headers in the second API call.

The second API call requires no headers and in the authorization I'm passing jwt token which I got after the first API call, but it keeps passing the first API headers in the second API call.